Deuteronomy 21:18-21

citizenLup asked this question:
Why do Christians believe the Bible to be true and claim they are good people?
When it says things like this

Deuteronomy 21:18-21
If someone has a stubborn and rebellious son who will not obey his father and mother, who does not heed them when they discipline him, then his father and his mother shall take hold of him and bring him out to the elders of his town at the gate of that place. they shall say to the elders of his town ,"This son of ours is stubborn and rebellious. He will not obey us. He is a glutton and a drunkard." then all the men of the town shall stone him to death. So you shall purge the evil from your midst; and all the Israel will hear, and be afraid.

Exodus 35:2
Six days shall work be done, but on the seventh day you shall have a holy sabbath of solemn rest to the Lord; whoever does any work on it shall be put to death.

Leviticus 20:13
If a man lies with a male as with a woman, both of them have committed an abomination; they shall be put to death; there blood is upon them.

Seems to me if they believe that they are just as wicked and sick as most inmates in the correctional systems.

i answer:
one of the many things ive learned on this section of QA is that sometimes Atheists get it! and they get some things correct. putting evolution aside.

the bible is called the perfect word of God. Every JOT and Tittle will not pass away. Yet the bible code is corrupted. so the code can be changed if someone understands its secret.
the new testament is riddled with minor personal commentary which are called absolutely true today! some even go as far as saying every word is God breathed which is changed from "inspired by God".

as a born again protestant christian i believed everything i was taught because MY LEADERS couldnt be deceived! right?
as an lds witness of jesus, i saw Jesus! so I KNOW like the prophets and greater teachers of christianity that Atheists are completely wrong but justifiably misguided.
the bible NEVER was intended to be the absolute truth, it was meant to be a small library of canon that everyone can hold in their hands if one could afford it. but in our day everyone can afford it. its something that allows believers to ponder on the mysteries of God. and keep their minds excercised on the things of faith.
that be said in answer to your question, in deuteronomy, Jesus said forgiveness is greater than punishment He also called people who believe in such things should turn the other cheek. NOT to hate enemies but to love them. after all most hatred is percieved NOT real.
there are a few things that christianity changes from the OLD testament. eating food and mikvahs are one practice.
another way of looking at this verse is that it was NOT God who spoke but it was inpiration of the time. so it is again NOT all the God breathed words of God .